磁器の透光度におよぼす滑石添加の影響 (第2報) : 磁器の色調と第1鉄対第2鉄比

概要

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Specimens of porcelain bodies containing 1% of Fe2O3 and various amounts of talc were prepared by heating to 1300°C in a reducing atmosphere. Ferrous iron-and total iron contents of the specimens were determined by chemical analysis. The ratio of FeII/FeIII in porcelain body increased generally with the talc content of the body. The transmittance of the specimens of the thicknesses of 0.2, 0.5, and 1.0mm were measured by a spectrophotometer and obtained their chromaticity coordinates, brightness, dominant wave lengths, purities, transmittances and complementary dominant wave lengths. The color of porcelain specimen A (0% talc) was gray-bluish white, that of B (2% talc) became brighter and more bluish white, while that of C (5% talc) turned to creamish white. It was concluded that the change of color tint was resulted from the combination of the change of FeII/FeIII ratio and the increase of translucency of the body by the addition of talc.
社団法人日本セラミックス協会の論文